
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>更新时的一个问题</title>
    <script src="../commonjs/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入姓名" v-model="keyWord">
        <ul>
            <li v-for="person in persons" :key="person.id">
                {{person.name}}-{{person.age}}--{{person.sex}}
            </li>
        </ul>
        <button @click="updateMei">更新马冬梅的信息</button>
    </div>
    <script>
        Vue.config.productionTip = false;//关闭开发提示
        new Vue({
            el:'#root',
            data:{
                persons:[
                    {id:'001',name:'周冬雨',age:30,sex:"女"},
                    {id:'002',name:'马冬梅',age:31,sex:"女"},
                    {id:'003',name:'周杰伦',age:19,sex:"男"},
                    {id:'004',name:'王卓伦',age:18,sex:"男"},
                ],
                keyWord:'',
                sortType:0  //排序顺序：0.原顺序  1.年龄降序  2.年龄升序
            },
            methods:{
                updateMei(){
/*                    this.persons[1].name='马老师'
                    this.persons[1].age=50
                    this.persons[1].sex='男'*/  //奏效
                    // this.persons[1] = {id:'002',name:'马老师',age:50,sex:"男"} //无效
                    this.persons.splice(1,1,{id:'002',name:'马老师',age:50,sex:"男"}) //使用splice(索引),1(删除1个),新的元素)替换
                }
            }
        })
    </script>
</body>
</html>